Project 1999 F.A.Q.

[bigups43]

So if the exp% +/-'s are multiplied then a halfling ranger would be -40% * +%5 which is -200% which seems a little ridiculous to me. Whereas a troll SK should be +800%, unless you guys mistyped something....

[Pyrocat]

Exp math is a little weird. I've updated the OP to be slightly more explanatory.

Human cleric = 1.0
any hybrid = 1.4
any troll = 1.2
troll hybrid = 1.2 x 1.4 = 1.68
any warrior = 0.9 (1.0 minus 10%)
any halfling = 0.95 (1.0 minus 5%)
halfling warrior = 0.855 (.9 x .95), which is 14.5% bonus